Flyon crank lenght / sprocket change

[saione]

Hi.
I'm just a beginner with TQ motor.
Changing chank lenght (reducing it) does require a new mapping of the motor?
Similarly, increasing the cassette sprocket to 51 from 46 can create problems?
Thanks in advance.

 

[All4Fun]

Hello,

I chanced from 42 to 46, haven't had any problems.